package com.ysd.gulimall.cart.interceptor;

import com.ysd.common.vo.MemberRespVo;
import com.ysd.gulimall.cart.vo.UserInfoTo;
import com.ysd.common.constant.CartConstant;
import org.apache.catalina.User;
import org.springframework.stereotype.Component;
import org.springframework.util.StringUtils;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.util.UUID;

/**
 *   执行方法之前先判断用户登录状态
 *   并封装传给controller
 */
public class CartInterceptor implements HandlerInterceptor {
    public static ThreadLocal<UserInfoTo> threadLocal=new ThreadLocal<>();
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response,
                             Object handler) throws Exception {
        UserInfoTo userInfoTo = new UserInfoTo();
        HttpSession session= request.getSession();
        //拿到登录人得信息+++++++++++++++++++++++++++++++++++++++
        MemberRespVo member = (MemberRespVo)session.getAttribute("loginUser");
        if(member != null){
            //用户登录了
            userInfoTo.setUserId(member.getId());
            System.out.println(member.getUsername()+member.getNickname());
        }
        Cookie[] cookies = request.getCookies();
        if(cookies!=null&& cookies.length>0){
            for (Cookie cookie:cookies){
                //userKey
                String name=cookie.getName();
                if(name.equals(CartConstant.TEMP_USER_COOKIE_NAME)){
                    userInfoTo.setUserKey(cookie.getValue());
                    userInfoTo.setTempUser(true);
                }
            }
        }
        //没有临时用户  分配一个临时用户
        if(StringUtils.isEmpty(userInfoTo.getUserKey())){
            String uuid= UUID.randomUUID().toString();
            userInfoTo.setUserKey(uuid);
        }
        //方法执行前
        threadLocal.set(userInfoTo);
        return true;
    }

    /**
     * 业务执行后
     * 存cookie
     * @param request
     * @param response
     * @param handler
     * @param modelAndView
     * @throws Exception
     */
    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        UserInfoTo userInfoTo = threadLocal.get();
        if (!userInfoTo.isTempUser()){
            Cookie cookie = new Cookie(CartConstant.TEMP_USER_COOKIE_NAME, userInfoTo.getUserKey());
            cookie.setDomain("localhost");
            cookie.setMaxAge(CartConstant.TEMP_USER_COOKIE_TIMEOUT);
            response.addCookie(cookie);
        }
    }
}
